treat_code isn't a factor, but a numeric variable. You should use: summary(aov(EtoH~as.factor(treat_code), mydata)) TukeyHSD(aov(EtoH~as.factor(treat_code), mydata))
Bart -- View this message in context: http://n4.nabble.com/TukeyHSD-troubles-tp1570205p1570228.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
